Unknown
PANGAEA
In:
Supplement to: Hart, Stanley R; Staudigel, Hubert (1978): Oceanic Crust: Age of hydrothermal alteration. Geophysical Research Letters, 5(12), 1009-1012, https://doi.org/10.1029/GL005i012p01009
Publication Date:
2024-05-15
Description:
Times of vein mineral deposition in the ocean crust have been determined both by Rb-Sr isochron ages of vein smectites and by comparison of 87Sr/86Sr ratios of vein calcites with the known variations of seawater 87Sr/86Sr ratio with time. Results from drilling sites 105, 332B and 418A, Atlantic Ocean, which have basement formation ages of 155 m.y., 3.5 m.y., and 110 m.y., respectively, show that vein deposition is essenrially complete within 5-10 m.y. after formation of the basaltic crust. This provids direct evidence that hydrothermal circulation of sea-water through the oceanic crust is an important process for only 5-10 m.y. after crust formation.
Keywords:
11-105; 37-332B; 51-417A; 52-418A; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg11; Leg37; Leg51; Leg52; North Atlantic/CONT RISE; North Atlantic/HILL; North Atlantic/VALLEY
Type:
Dataset
Format:
application/zip, 2 datasets
|
Location |
Call Number |
Expected |
Availability |
